Hi,

Plus the information Anand has provided, i'd like to add, each router supports different kinds of interface, example Cisco 7200VXR supports only PAs, while the 2600 series supports both WICs and NMs but not PAs.

Check this link for more details:

http://www.cisco.com/en/US/products/hw/modules/tsd_products_support_category_home.html

HTH, please do rate all helpful replies using the scroll box on the right,

Mohammed Mahmoud.